Update README.md

Author: mkumatag

README.md

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+🚨 **This repository is now archived and no longer maintained.** 🚨  
+
+This means:  
+- No further updates, bug fixes, or feature additions will be made.  
+- Issues and pull requests will not be reviewed.  
+- The repository remains available for historical reference.  
+
+For alternative solutions or continued development, please check:  
+👉 https://github.com/kubernetes-sigs/provider-ibmcloud-test-infra/tree/main/kubetest2-tf
+
 # kubetest2-plugins
 
 This project contains the [kubetest2](https://github.com/kubernetes-sigs/kubetest2) plugins for deploying k8s on different ppc64le cloud and run the tests on it. This plugin predominantly uses terraform for infrastructure provisioning and ansible for setting up k8s on the deployed infrastructure.